The GABRIEL 43163 Rear Coil Spring Assist Shock Absorber is engineered to enhance the stability and comfort of heavy-duty vehicles, particularly those frequently engaged in towing and hauling operations. Designed as a direct replacement for OEM parts, this shock absorber integrates advanced features to address the unique demands of commercial transportation. Its variable-rate rear coil springs effectively manage the additional weight from towing or hauling, maintaining optimal ride height and vehicle control. The shock absorber's 1-3/8" bore piston, constructed with bonded iron, ensures durability and a longer service life. A super-finished chromed piston rod provides superior corrosion resistance and enhances sealing properties, contributing to consistent performance over time. The leak-proof piston seal and rod guide eliminate oil bypass, ensuring efficient damping and reducing maintenance needs. With an extended length of 25.05" and a collapsed length of 15.69", the shock absorber offers a stroke of 9.36", accommodating a wide range of vehicle applications. Its design includes a dust tube to protect internal components from road debris and moisture, further extending its operational lifespan. The GABRIEL 43163 is compatible with various heavy-duty vehicles, including the GMC C3500HD (1991-2002) and Chevrolet C3500HD (1991-2002), as well as the GMC K3500 (1988-2000). By integrating this shock absorber into your fleet, you can expect improved vehicle stability, reduced maintenance costs, and enhanced ride quality, leading to increased operational efficiency and driver satisfaction.